{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "application", "process characterization", "biomedical", "machanical property", "manufacturing standard"], "input": "Companies that sell professional 3D printers include 3D Systems , Stratasys , Solido LTD , Voxeljet and ExOne ."}
{"concept or principle": [], "application": ["Companies", "3D Systems", "Stratasys", "Solido LTD"], "process characterization": [], "biomedical": [], "machanical property": [], "manufacturing standard": []}